cc: Fix recording of GPU rasterization histogram for renderer compositor.

cc/trees/layer_tree_host_unittest_record_gpu_histogram.cc

Index: cc/trees/layer_tree_host_unittest_record_gpu_histogram.cc
diff --git a/cc/trees/layer_tree_host_unittest_record_gpu_histogram.cc b/cc/trees/layer_tree_host_unittest_record_gpu_histogram.cc
new file mode 100644
index 0000000000000000000000000000000000000000..765ea63aa0fa2d4c8a041bc1ea555847f4693165
--- /dev/null
+++ b/cc/trees/layer_tree_host_unittest_record_gpu_histogram.cc
@@ -0,0 +1,37 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "cc/test/fake_layer_tree_host.h"
+#include "cc/test/fake_layer_tree_host_client.h"
+#include "cc/test/test_task_graph_runner.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace cc {
+
+namespace {
+
+TEST(LayerTreeHostRecordGpuHistogramTest, SingleThreaded) {
+  FakeLayerTreeHostClient host_client(FakeLayerTreeHostClient::DIRECT_3D);
+  TestTaskGraphRunner task_graph_runner;
+  LayerTreeSettings settings;
+  scoped_ptr<FakeLayerTreeHost> host =
+      FakeLayerTreeHost::Create(&host_client, &task_graph_runner, settings,
+                                CompositorMode::SingleThreaded);
+  host->RecordGpuRasterizationHistogram();
+  EXPECT_FALSE(host->gpu_rasterization_histogram_recorded());
+}
+
+TEST(LayerTreeHostRecordGpuHistogramTest, Threaded) {
+  FakeLayerTreeHostClient host_client(FakeLayerTreeHostClient::DIRECT_3D);
+  TestTaskGraphRunner task_graph_runner;
+  LayerTreeSettings settings;
+  scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create(
+      &host_client, &task_graph_runner, settings, CompositorMode::Threaded);
+  host->RecordGpuRasterizationHistogram();
+  EXPECT_TRUE(host->gpu_rasterization_histogram_recorded());
+}
+
+}  // namespace
+
+}  // namespace cc